Nike ACG Ultrafly Trail - Hyper Crimson / White

Light and fast but stable, the Nike ACG Ultrafly Trail in Hyper Crimson/White/Total Orange/Vivid P...

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KICKSCREWNike Men's Hyper Crimson/Total Orange/White X Acg Ultrafly 2 ' ' Hf5668-801
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£209.00
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Product Information

Full details

The Nike ACG Ultrafly Trail is designed for trail runners seeking a light, fast, and stable shoe for conquering challenging terrain. Its key benefit is a more responsive, smoother, and softer feel than previous models, thanks to updated ZoomX foam and a refined carbon plate, allowing for enhanced performance on race day and technical trails. A potential caveat is that the updated design might feel less stiff than the original for runners who prefer a more rigid feel.

All features

Model Part NumberHF5668-801
BrandNike

Extended Product Information

FAQs

What is the main difference between this model and the original Ultrafly?

The Nike ACG Ultrafly Trail updates the original with a softer, smoother ride due to reduced stiffness in the carbon plate and unwrapped ZoomX foam in the heel, enhancing responsiveness.

How much does the Nike ACG Ultrafly Trail weigh?

The approximate weight is 287g (10.1oz) for a Men's US size 10.

Are these shoes suitable for road running?

These shoes are specifically designed for trail running. While they can be used on short sections of pavement, the aggressive lugged outsole is optimized for off-road traction and may wear quickly on roads.

How deep are the lugs on the outsole?

The outsole features 3mm lugs for traction on varied trail surfaces.

What is the stack height and heel-to-toe drop?

The stack height is 37mm at the heel and 28.5mm at the forefoot, resulting in an 8.5mm heel-to-toe drop.

How does the upper handle water?

The upper is made from lightweight, breathable, and durable materials specifically designed for water drainage to help keep your feet drier when running through puddles or wet conditions.

What makes the midsole responsive?

The midsole uses Ultra-responsive ZoomX foam, which provides Nike's highest energy return. The foam is unwrapped in the heel for even greater responsiveness on impact.

Troubleshooting

Feet feel unusually wet after a run in dry conditions.

This may indicate an issue with the water-drainage upper not functioning correctly. Ensure no debris is blocking the drainage channels in the upper. If the problem persists, contact customer support.

Reduced grip on wet surfaces.

The Vibram Megagrip outsole is designed for excellent traction, but extremely slick surfaces can still be challenging. Ensure the outsole is clean of mud or debris. If wear is visible, consider replacement.

Shoe feels too soft or lacks stability.

The Ultrafly Trail features a softer, more responsive feel with a less stiff carbon plate than some previous models. If you prefer a firmer ride, these shoes might not meet that specific need. Ensure laces are tied securely for optimal stability.

Laces come undone frequently.

Try a double knot for the laces. Ensure the laces are not excessively worn or frayed, which can cause them to slip. The fit band and gusseted tongue help secure the foot, but lace security is still crucial.

Pros and Cons

Pros

  • Enhanced responsiveness and softer feel due to updated ZoomX foam.
  • Excellent grip and stability on wet and challenging trails thanks to Vibram Megagrip.
  • Effective water drainage for comfort in wet conditions.
  • Lightweight yet durable construction for long-distance performance.
  • Smoother ride on uneven terrain with the refined carbon plate.

Cons

  • May feel less stiff than the original model for runners preferring maximum rigidity.
  • The focus on softness might be less ideal for runners who prioritize a very firm feel.
  • While durable, aggressive trail use can eventually wear down any outsole compound.

Setup, Compatibility & Care

Setup: The Nike ACG Ultrafly Trail is ready to wear right out of the box. Ensure the laces are adjusted for a secure and comfortable fit, paying attention to the gusseted tongue and fit band for optimal lockdown.

Compatibility: These shoes are designed for trail running and are compatible with most types of trail terrain, from packed dirt to rocky and muddy paths. They are not optimized for road running, where the lugged outsole may offer reduced traction and increased wear.

Care:

  1. Cleaning: After runs, rinse off excess mud and dirt with cool water. Use a soft brush to gently scrub the outsole and upper if needed. Avoid using harsh detergents or abrasive cleaners.
  2. Drying: Stuff the shoes with newspaper or a dry towel to absorb moisture and help them retain their shape. Allow them to air dry completely at room temperature, away from direct heat sources like radiators or sunlight, which can damage the materials.
  3. Storage: Store the shoes in a cool, dry place when not in use. Avoid storing them in plastic bags or airtight containers, as this can trap moisture.

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